X+y=155. Y= -x+155
1.50x +4(-x+155)= 520
1.50x-4x+620=520
-2.5x =-100
X= 40. Y=110
27) if a = 1/a
multiply both sides by a
a * a = 1/a * a
a^ 2 = 1
Answer is D) 1
28)
6 x 75 = 450
7 x 80 = 560
8 x 85 = 680
9 x 90 = 810
Total all students in class = 6 + 7 + 8 + 9 = 30 students
Total score of whole class:
450 + 560 + 680 + 810 = 2500
Average = 2500 /30 = 83.3 = 83 1/3
Answer is C) 83 1/3
Answer:
You said what now?
Step-by-step explanation:
Answer:
It costs $4 dollars for 20 ounces of cheese.
Step-by-step explanation:
First we find out how many dollars for 1 ounce of cheese.
3.20 ÷ 16 = 0.2
Next we multiply 0.2 by 20.
20 * 0.2 = 4
So, the answer is 4 dollars.
Hope this helps! :)
Answer:
x ≤5
Step-by-step explanation:
There is a closed circle at 5 so that means equals
The line goes to the left so that means less than
x ≤5
